Hose-coupling.



F. DAVIS HOSE OUPLIISHWv Pmmwmf FILM mm. a, 1909.

99:4.,'7 2.3..l -Pantea Jud@ 13, 1911n j movable contact elements or plungers. Fig.

A\ ing arm 5 having an inwardly projecting the corresponding element of the other cou-- FRANK DAVIS, 0F ATLANTA, GEORGIA.

H0SIE!-COUPLING` Specification of Letters Patent. Paten-ted June 13, 1911.

Application filed December 8, 1909. Serial No. 581,936.

To clliwh/om it may concern:

jB'e it known. that I, FRANK Davis, a citizen of the United States, residing at Atlanta,in the county of Fulton and State of Georgia, have invented new land useful Improvements in Hose-Couplings, of which the following is a specication.

This invention relatesv to hose coupling,V the main object of the invention being to provide a device of the character referred to especially adapted for coupling together the sections of steam or vacuum hose used on railway trains, the rimary object of the invention being to pro uce a steam and vac uum air-tight joint where the hose sections are coupled together so as to eifectnally prevent leakage.

With the above and other objects in view, the nature of which will more fully appear as the description proceeds, the invention consists in thenovel construct-ion, combination and'arrangement'of parts as herein fully described, illustrated and claimed.

In the accompanying drawing :wFigure l is a longitudinal section through a pair of coupling heads, illustrating the present inn vention. Fig. 2 is a plan view of one of the 3 is a detail perspective view of one of the packing rings Y Referring to the drawings, l and 2 desigA nate adjoining hose receivingsections pro vided rbspectively with coupling headsl and 4, each of which has alongitudinallyextend1 lug 7 at its end which is adapted to interlock with the lug 6 projectingirom the side of the opposite coupling head. The lugs on the arms and heads are adapted to be turned into interlocking engagement with each other by pressing the heads together when the lugs 7 and'G are out of almement and rotating the heads in o posite directions When in contact with eac other the lugs 6 and 7 are adapted to hold the coupling heads closely together, as illustrated in Fig. 1.

Each of the coupling heads is of 'larger diameter both externally and internally than the adjacent hose receiving sections l or .2, as the case may be, as shown in Fig. 1, thereby providing la rear internal annular shou1- der 8 againstjwhich bears one end of a coil spring 9 the purpose of which is to hold the respective plunger or contact element against pling head. Each coupling head also contains a longitudinally movable lunger or joint-forming element 10, which as a general cylindrical shape, as shown in Fig. Zand 1s mounted to slide easily' and snugly within the bore of the coupling head.

The inner end of the plunger or jointh forming element is rovided with a convex face 1l which rests 1n contact v'with the cor'-V more stop screws 14 inserted throhgh the coupling head and having the inner ends thereof arranged in an annular recess or groove l5 in the outer periphery of the member 1Q. This prevents ,the member 1.0 from being pushed out of the coupling head when uncoupled.

From the foregoing description, taken in connection with the accompanying drawing,

i'twill be seen that a perfectly tight' joint 1s obtained between the packing rin 13y and the inner wall of the coupling hea and'also between said packing ring and the adjacent end of the j ointfforming element or plunger l0 which eii'ectually preventsleakage of aiff, steam or vacuum. The meeting faces 15 o the members l() areground so as to roduce a perfectly tight metallic joint, sai meet ing faces being held tightl in Contact with each other by the action o the springs 9 at and within 'the inner ends oi the coupling heads. I

I claim:-

A coupling com heads having a cy indrieal bore and interna. annular shoulders, joint-forminglrnembers slidably and rotatably mounted in 'the heads and having convex inner faces and external annular channels, packing rings having`conrisingl a-pair of couplin I caved faces to engage the convex fa'ces'of the* jointforming members, a sprin inter osed between the packing members an thes oul l ders to hold the acking ring in engagement with 'the jointorming members and the joint forming members normally projected, a

pair of screws entering the casing and project. ing into the annul. channel and adapted to tot limit the movement of the joint-forming In testimony whereof I aix my signature member but permitting its rotary movement in prese-nee of two Witnesses. said joint-forming members having ground contacting faces, and means to connect the FRANK DAVIS heads together, Said means covering one of Witnesses:

the limiting screws and preventing its d'is- GEO. S. RUSSEY,

engagement. A. G. STEINHEIMER. 

